包装印刷板块9月4日跌0.56%，中锐股份领跌，主力资金净流出3.28亿元

Market Overview - The packaging and printing sector experienced a decline of 0.56% on September 4, with Zhongrui Co., Ltd. leading the drop [1] - The Shanghai Composite Index closed at 3765.88, down 1.25%, while the Shenzhen Component Index closed at 12118.7, down 2.83% [1] Stock Performance - Notable gainers in the packaging and printing sector included: - Hongyu Packaging Materials: closed at 62.93, up 29.99% with a trading volume of 105,700 shares and a turnover of 567 million [1] - Hujiang Materials: closed at 24.52, up 7.54% with a trading volume of 105,800 shares and a turnover of 254 million [1] - Fangda New Materials: closed at 19.12, up 5.64% with a trading volume of 56,500 shares and a turnover of 105 million [1] - Conversely, Zhongrui Co., Ltd. saw a significant decline, closing at 2.94, down 7.26% with a trading volume of 1,376,000 shares and a turnover of 405 million [2] Capital Flow - The packaging and printing sector experienced a net outflow of 328 million from institutional investors, while retail investors saw a net inflow of 383 million [2] - The capital flow for specific stocks showed: - Yongji Co., Ltd.: net outflow of 35.32 million from institutional investors [3] - Zhongrui Co., Ltd.: net inflow of 29.73 million from institutional investors [3] - Dashing Co., Ltd.: net inflow of 18.72 million from institutional investors [3]